2004-10-30/2019-09-01 - From the OHS PC Database, derived from A Guide to North American Organbuilders,, rev. ed., by David H. Fox (Organ Historical Society, 1997). - Partner with Charles E. Hallman in Burness Associates of (Philadelphia, Pennsylvania?), 1967; (in Gamble & Hallman of Glenside, Pennsylvania, c. 1980s?). Sources:
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